I am just getting into electronics and am working on the analysis of 7 electrical circuits. The asked information are:

- if the circuit is coherent or not
- the voltage u and the current i depending on e, j and the resistance(s)
- if more than 1 power source, determine which one(s) deliver and which one(s) absorb power

I have come up with the following solutions for the circuits (shown in the left column). Could you tell me if/where I am wrong and if possible explain how else one would have to go about it? Especially the last circuit I think is not correct, I hope my attempt at an answer and the calculation route I used is clear by my scribbeling.

Any help is greatly appreciated, thank you so much!

Best regards,

Jo